Can't update/download via wifi

Just bought the N6 again. But the phone can't install system update or playstore apps via wifi. The wifi is working, can watch youtube, and download/update apps via LTE, but not wifi. Just says downloading, but nothing ever happens after that. When I check under apps, I don't see any clear cache options under playstore or google services. Thanks

Thanks for the reply. LOL, last night we had some high wind gusts in my area. The cable eventually went out, so I guess the system wasn't operating at full capacity when I was setting up the phone. . Woke up this morning and the cable was still completely out. Once service was restored, I tried again and this time everything worked OK. .Playstore updated apps and the check for system updates e just downloaded and installed the Feb security patch. So it looks like it's working now.